12/11/21

Mass , force and velocity are given.
The driver of a 2.0 × 103 kg car A traveling on the highway at 45m/s slams on his brakes to avoid striking a second car B in front of him, which had come to rest because of blocking. After the... more
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12/11/21

Simplify each of the following expressions.

a. (2𝑥+3)^2 −(𝑥−4)(3𝑥+1) b.3√16𝑥^10𝑦^6
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12/10/21

The resistance in a radio is 10 ohms. The electric current passing through the radio measures 21 amps. What is the voltage?
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12/10/21

Why would knowing the pendulum length required for a period of one second be useful ?
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12/10/21

Why use the period squared of a pendulum rather than just the period?

Im trying to understand why you use the period squared of a pendulum rather than just the period? and why its useful when drawing a graph? A detailed explanation would be greatly appreciated :")
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12/10/21

Newton's First Law: If the forces on an object are ________, it’s either ________ or moving at ________ speed.
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12/10/21

Math Pythagorean theorem help
The hypotenuse of a right triangle is twice ass long as one of the legs. If the perimeter of the triangle is 25 cm, determine the length of the hypotenuse, accurate to three places after the... more
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12/09/21

A mass suspended from a spring oscillates in simple harmonic motion.

A mass suspended from a spring oscillates in simple harmonic motion. The mass completes 2 cycles every second, and the distance between the highest point and the lowest point of the oscillation... more
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12/09/21

physics question

An astronaut in an orbiting spacecraft feels "weightless" because she
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12/09/21

NEED ASAP! solve 5^4-x = 7^3x+1. Write answer in exact form, not in decimal approximations for any values.

Solve: 54-x = 73x+1answer in exact form, not in decimalDo not use properties of logarithms to simplify final answer.
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12/09/21

Physics conversion of momentum
QUESTION: a cannon is sitting loaded with a cannonball making the total momentum of the system before firing 0 kg*m/s. in order to conserve momentum after firing what has to happen to the cannon... more
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12/08/21

how do i calculate the acceleration of a car with these variables?
heres the question, A pendulum of mass,1kg,is suspended from the roof of a car travelling on a level road. An observer in the car notices the string makes an angle of 10 degrees with respect to the... more
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12/07/21

acceleration given mass and friction
A worker pushes a heavy (100-kg) crate that is resting on a thick pile carpet. The coefficients of static and kinetic friction are 0.6 and 0.4, respectively. The worker pushes with a horizontal... more
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12/07/21

Need help answering a homework question

Suppose that C is directly proportional to the square of the distance d. C=81 wen d=3. Find the coefficient K and write the formula for C. Use your formula to find C when d=5.
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12/07/21

Jupiter orbits the Sun twice in 23.72 years. What is the length of its semi-major axis as it orbits the Sun, in AU?
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12/06/21

Please help (correct answer only)

Calculate the translational speed of a cylinder when it reaches the foot of an incline 7.35 m high. Assume it starts from rest and rolls without slipping. Express your answer with the appropriate... more
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12/06/21

an electric fan blade, finding angular speed and acceleration
An electric fan blade is rotating at a rate of 210 rev/min when it is subsequently switched off. The blade then takes 35.5 seconds to come to rest.A. What is the initial angular speed of the fan... more
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12/06/21

A ball thrown horizontally traveled a vertical distance of 20 m while moving horizontally a distance of 10 m. What is the initial horizontal velocity of the ball?
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12/06/21

pls include solution for better understanding thankyou!
A spring has a spring constant of 4.4 x 104 N/m. What is the change in elastic potential energy stored in the spring when its stretch is increased from 12.5 cm to 15 cm?
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12/05/21

Three point masses- finding center of mass

Three point masses lie in a plane and are connected by masses rods so that they cannot move relative to each other. The masses and their positions are:m1 = 2.1 kg at (-9 m, -3 m)m2 = 2.6 kg at... more
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12/05/21

Angular momentum of a child on a merry go round
At a particular playground there is a merry-go-round that may be thought of as a flat, solid disk of mass 142 kg and radius 1.44 m. A child whose mass is 24.7 kg is running toward the outer rim of... more
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12/04/21

As Venus orbits the sun, it’s semi-major axis length is 0.72 AU. how long does it take Venus to orbit the sun in years?
A) 0.61 yearsB) 0.37 yearsC) 0.80 yearsD) 0.72 years
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12/04/21

find binding energy
Find the binding energy (in MeV) for lithium 3Li9 (atomic mass = 9.026789 u).
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12/04/21

The problem for AP physics C students about the motion of the body by influence of a conservative force. If you can solve this problem, I would like to tutor you and give you a discount.

A small object with mass m = 0.09 kg moves along the x-axis. The only force on the object is a conservative force that has potential energy function U(x) = - αx2 + βx3 , where α = 2.00 J / m2 and... more
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12/04/21

Physics energy of pendulum
A 16.9 kg monkey is swinging on a5.32 m long vine. At the bottom ofits swing, it is moving 11.3 m/s. Towhat height does it swing?(Unit = m/s(
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